K.K.
Our daughter used to wake up around this age with "nightmares" or something like them. I didn't know what to do and the pediatrician said to distinguish if it's a pain cry or just a regular cry. As long as you know she is okay (not stuck in the crib rails or anything- we've had that happen with our daughter's legs a few times)- you really have to try your best to let her just fall back asleep. It's very important that she learn to soothe herself. Plus, really what you are teaching her is that every time she wakes up even slightly and cries a little, you will come and hold her for a little bit. Of course she wants her mama to come hold her so she has basically learned "hey if I want mom in the middle of the night to come hold me, all I have to do is cry a little." You have to kind of "unlearn" that behavior with her. I know it's hard, I've been there, but it gets easy because after she has realized it won't work anymore, she will be fine. It might take a few nights- or even more, but stay strong. You can do it!